Ideal for making countersunk holes for countersunk screw heads and plugs The countersink is made of carbon steel and the surface is plated with titanium, which is sturdy and durable, not easy to rust and has a long service life. The kit is suitable for household DIY and daily use, and can be drilled easily and efficiently without burrs. The universal size is compatible with all types of drill bits and drill bits, including vertical drill bits and other common end mills. This set of 6 three-blade 90 degree drill bits is suitable for processing metal and some non-metal materials. metal, such as carbon steel, light iron, insulation board, PVC board, aluminum, hardwood, cork, etc. Handle: round handle</p > Used for parts with a hardness of 25 or less, such as carbon steel, sheet metal, insulation boards, PVC boards and wood For holes in workpiece with 90° chamfered or tapered holes, the edges and corners of the machining angle and the chamfered surface Only one taper processing can be carried out. Suitable for small cutting processing. The edges are neat, smooth, without broken edges, low chamfering resistance, high precision in the hole, and more durable Large chip flute , rapid chip removal The three blades range from medium to laborious, each blade is less stressed, more efficient and more durable Product size: The handle diameter is between 0.5cm and 1.2cm, and the handle length is between 3cm and 4cm. Shipping quantity: 1 set, including 6 pieces